Tap Holder Reference Chart

TapHolderReferenceChart.pdf Tap Holder Reference Chart Tap Size Decimal Equivalent PITCH (threads per in.) MM Per Thread Threads per mm 1.0mm .0393 101.60 .25 4.000 1.1mm .0433 101.60 .25 4.000 1.2 mm .0472 101.60 .25 4.000 1.4 mm .0551 84.66 .30 3.333 #0 .0600 80 1/16″ .0625 64 1.7 mm .0669 72.56 .35 2.857 1.8 mm… Continue reading Tap Holder Reference Chart

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Suggested Drilling Feed Rates

suggesteddrillingfeedrateschart.pdf Suggested Drilling Feed Rates (inches per rev.) MATERIAL BRINELL    HARDNESS HOLE DIAMETER 1/16″ 1/8 1/4 1/2 3/4 1 1 1/2 2 Aluminum 99-101 .001 .003 .007 .012 .016 .020 .025 .030 Aluminum Bronze 170-187 .001 .003 .004 .008 .010 .012 .015 .020 Balkelite – .002 .005 .006 .008 .010 .012 .015 .015 Brass 192-202… Continue reading Suggested Drilling Feed Rates

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